BREAKING: Devastating flooding strikes Ellicott City, Maryland

Roads turned into raging rivers in Ellicott City, Maryland, on Sunday afternoon when thunderstorms unloaded a month's worth of rain in less than two hours.

Main Street in Ellicott City experienced some of the worst flooding as swift-moving water swept cars down the road. Numerous water rescues were conducted around the town by emergency crews amid the high flood waters.

The significant rainfall prompted the National Weather Service (NWS) to issue a rare flash flood emergency for Ellicott City and surrounding areas.

"This is an extremely dangerous and potentially catastrophic situation," the NWS said.

Shocking footage of the flooding:

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Flooding in Ellicott City, Maryland

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Flooding in Ellicott City, Maryland

It’s happening all over again. Main Street in @EllicottCity with devastating flooding. @CairnsKcairns @FOXBaltimore… https://t.co/JM6KBSN6S6

DEVELOPING: Flash flooding, water rescues reported in Maryland as heavy rain soaks much of the state.… https://t.co/tQ2bqkt9rX

Main Street #EllicottCity flooding. https://t.co/crYP74go08

It's happening again! Flash flooding devastating Main St. in Old Town Ellicott City, MD rivaling the 2016 deadly fl… https://t.co/5JvZude3Cg

Major flooding in Ellicott City; State of Emergency declared >> https://t.co/kUvSvKBNoO https://t.co/OwaLbxcmws

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Radar estimated that over six inches of rain had fallen in Ellicott City as of 5:30 p.m. EDT Sunday, AccuWeather Senior Meteorologist Kristina Pydynowski said.

According to the USGS, the Patapsco River near Catonsville, Marlyland, rose 15.3 feet in just 75 minutes following the significant rainfall.

This is the second time in two years that Ellicott City was hit by a significant flood. Some people in the town on Sunday afternoon remarked that this flash flood was worse than that of July 30, 2016.

During the 2016 flood, nearly six inches of rain fell in under two hours time, much of which falling in under an hour. This flooding left two dead, hundreds of vehicles damaged or totaled and significant damage and erosion around the town.

Drier weather is in the forecast this week, which should aid in cleanup efforts.

"The Baltimore area should see some much drier weather over the next couple of days," AccuWeather Meteorologist John Feerick said.

"A cold front could trigger a shower or thunderstorm on Tuesday afternoon, but we're not expecting anything to the intensity of Sunday's rainfall," Feerick added.

Portallis employee says water is up to the second floor. It was not that high last time. #EllicottCity